<!DOCTYPE html>
<title>
  Single-line column flex fragmentation: we shouldn't insert a forced break if
  there's no preceding content at the start of a fragmentainer.
</title>
<link rel="help" href="https://drafts.csswg.org/css-flexbox-1/#pagination">
<link rel="match" href="../../reference/ref-filled-green-100px-square.xht">
<style>
  .multicol {
    column-count: 2;
    column-gap: 0px;
    column-fill: auto;
    height: 100px;
    width: 100px;
    background: red;
  }
</style>
<p>Test passes if there is a filled green square and <strong>no red</strong>.</p>
<div class="multicol">
  <div style="display: flex; flex-direction: column; width: 50px;">
    <div style="height: 100px; break-before: column; background: green;"></div>
    <div style="height: 100px; break-before: column; background: green;"></div>
  </div>
</div>
